Learning How to Create Behavior Models - Answers to Questions - Answers to the Chapter 4 Review Questions -
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Answers to the Chapter 4 Review Questions

Following are the answers to the Review Questions on page 50:

1. What causes an alarm to move from one state to another?

   An alarm moves from one state to another when a poll, mask, alarm, or other NerveCenter object fires a trigger whose key attributes match those of a pending alarm transition.

2. When is it unnecessary to specify a property for an alarm definition?

   It is unnecessary to specify a property for an alarm definition when all of the associated NerveCenter objects, such as polls or masks, are assigned that same property.

3. You need an alarm that first checks for high traffic on an interface and only then checks for a high error rate. Assume that you've already defined the necessary polls to collect the appropriate data. Draw an example of the state diagram below: (The names used in your diagram may differ, but the structure should be similar.)